42 lines
957 B
JavaScript
42 lines
957 B
JavaScript
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const Transform = require('stream').Transform || require('readable-stream/transform')
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, inherits = require('util').inherits
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, xtend = require('xtend')
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function noop (chunk, enc, callback) {
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callback(null, chunk)
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}
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function ctor (options, transform, flush) {
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if (typeof options == 'function') {
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flush = transform
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transform = options
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options = {}
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}
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if (typeof transform != 'function')
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transform = noop
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function Through2 (override) {
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if (!(this instanceof Through2))
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return new Through2(override)
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this.options = xtend(options, override)
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Transform.call(this, this.options)
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}
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inherits(Through2, Transform)
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Through2.prototype._transform = transform
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if (typeof flush == 'function')
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Through2.prototype._flush = flush
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return Through2
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}
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function make (options, transform, flush) {
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return ctor(options, transform, flush)()
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}
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module.exports = make
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module.exports.ctor = ctor
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